Method For On Line Evaluation Of Materials Using Prompt Gamma Ray Analysis
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Release | : 2009 |
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A method for evaluating a material specimen comprises: Mounting a neutron source and a detector adjacent the material specimen; bombarding the material specimen with neutrons from the neutron source to create prompt gamma rays within the material specimen, some of the prompt gamma rays being emitted from the material specimen, some of the prompt gamma rays resulting in the formation of positrons within the material specimen by pair production; collecting positron annihilation data by detecting with the detector at least one emitted annihilation gamma ray resulting from the annihilation of a positron; storing the positron annihilation data on a data storage system for later retrieval and processing; and continuing to collect and store positron annihilation data, the continued collected and stored positron annihilation data being indicative of an accumulation of lattice damage over time.
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Total Pages | : 1058 |
Release | : 1975 |
Genre | : Nuclear energy |
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Total Pages | : 5 |
Release | : 2002 |
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To assay the degradation of high explosives (HE) by a material-loss mechanism, prompt gamma activation analysis (PGAA), using a miniature neutron accelerator developed at Lawrence Berkeley National Laboratory (LBNL) is proposed. Whereas the PGAA signatures from carbon and nitrogen in the chemical matrices are relatively low, fast neutrons may be used due to the higher cross sections for interaction. By using the upgraded PGAA database developed by the Isotope Projects Group at LBNL in collaboration with new PGAA data obtained at the Institute of Isotope and Surface Chemistry in Budapest, Hungary, it should be possible to observe and potentially to quantify a macroscopic loss of mass in HE.
Author | : G. Molnar |
Publisher | : Springer Science & Business Media |
Total Pages | : 448 |
Release | : 2010-02-23 |
Genre | : Science |
ISBN | : 0387233598 |
Prompt gamma activation analysis (PGAA) is a unique, non-destructive nuclear analytical method with multi-element capabilities. It is most effective if intense neutron beams (especially cold beams) of nuclear reactors are used to induce the prompt gamma radiation. Based largely on the authors' pioneering research in cold neutron PGAA, the handbook describes the methodology in self-contained manner and reviews recent applications. The library of prompt gamma ray data and spectra for all natural elements is a unique aid to the practitioner. The level is understandable by a broad audience, which facilitates teaching and training. The Handbook of Prompt Gamma Activation Analysis is a comprehensive handbook written for those practising the method, wanting to implement it at a reactor facility, or just looking for a powerful non-destructive method of element analysis. The book is also useful for nuclear physics, chemistry and engineering scientists, scholars and graduate students interested in neutron-induced gamma ray spectroscopy and nuclear analytical methods.
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Total Pages | : 1160 |
Release | : 1986 |
Genre | : Aeronautics |
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Total Pages | : 1472 |
Release | : 1991 |
Genre | : Medicine |
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Author | : Akira Otsuki |
Publisher | : Elsevier |
Total Pages | : 842 |
Release | : 2023-09-01 |
Genre | : Science |
ISBN | : 0323984789 |
Non-Destructive Material Characterization Methods provides readers with a trove of theoretical and practical insight into how to implement different non-destructive testing methods for effective material characterization. The book starts with an introduction to the field before moving right into a discussion of a wide range of techniques that can be immediately implemented. Various imaging and microscopy techniques are first covered, with step-by-step insights on characterization using a polarized microscope, an atomic force microscope, computed tomography, ultrasonography, magnetic resonance imaging, infrared tomography, and more. Each chapter includes case studies, applications, and recent developments. From there, elemental assay and mapping techniques are discussed, including Raman spectroscopy, UV spectroscopy, atomic absorption spectroscopy, neutron activation analysis, and various others. The book concludes with sections covering displacement measurement techniques, large-scale facility techniques, and methods involving multiscale analysis and advanced analysis. Provides an overview of a wide-range of NDT material characterization methods, strengths and weaknesses of these methods, when to apply them, and more Includes eddy current sensing and imaging, ultrasonic sensing and imaging, RF and THz imaging, internet and cloud-based methods, among many others Presents case studies, applications and other insights on putting these methods into practice
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Total Pages | : 782 |
Release | : 1995 |
Genre | : Power resources |
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Total Pages | : 624 |
Release | : 1980-04 |
Genre | : Toxicology |
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Author | : National Institute of Standards and Technology (U.S.) |
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Total Pages | : 1162 |
Release | : 1994 |
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